液体姿控火箭发动机地面试验热结构分析

以液膜冷却结合辐射冷却的液体姿控火箭发动机为研究对象,采用一体化计算模型分析传热,同时应用有限元方法对给定温度条件的热结构进行了耦合分析,最后讨论了推力室在外压作用及温度载荷条件下结构的屈曲稳定性.计算结果与参考的试验结果接近,最高温度误差为3.67%,说明该一体化计算传热模型的有效性.考虑热载荷作用得到的屈曲载荷值较...

Analysis of thermo-structure for attitude liquid rocket engine in ground test

This paper focuses on the Attitude liquid rocket engine which uses the film cooling and radiation cooling method. A model based on film cooling heat transfer which employs an integrated analysis method is presented by this paper. The FEM was used to coupled analysis the thermal and structure of the thruster chamber, under the condition of the calculated wall temperature and pressure distributions. At last, by use of the FEM method, discuss the thruster chamber buckling under the condition of the given temperature pressure and the load of the extern pressure. The result is confirmed with referenced experiment result, the greatest temperature error is 3.67%, and the result states that the integrated analysis method to simulation the heat transfer is efficient; taking into account of the thermal load getting the buckling load higher about 5.79% than without thermal load. The results provide some theory support for engineering application.